Rutland Furlmatic 910-4 Windcharger Installation & Operation
Doc No: SM-138 Iss. A 29.01.13
14
Marlec Eng Co Ltd
Typical Wiring Diagrams For The Rutland FM910-4 Windcharger
Rutland FM 910-3 with HRSi Charge Regulator Wiring
Diagram
( OPTIONAL SOLAR PANEL FITTED )
Rutland FM 910-3 with HRDi Charge Regulator Wiring
Diagram
Rutland Furlmatic 910-4 Windcharger Installation & Operation
Doc No: SM-138 Iss. A 29.01.13
7
Marlec Eng Co Ltd
Principle Of Operation
Generator
The 3 phase ac generator is driven directly by the aerofoil blades, rotating
permanent magnets around the fixed stator winding. The variable frequency
alternating current is rectified within the generator housing, and the resulting
rectified current is transmitted via the sliprings and brushes at the yaw axis to
the output cable.
Winding Over-Temperature Protection
The generator stator winding incorporates embedded thermal protection to
protect the winding from damage due to over temperature during extreme winds.
On reaching the thermal protection limit, the device will reduce generator output
current to allow the winding to cool, whereupon normal performance will be
resumed. If the thermal protection is active, the turbine may reduce to a slow
rotational speed with a corresponding reduction in charge current, this is normal.
Furling Tail System
The tail assembly is designed to direct the turbine into the main direction of the
wind at windspeeds up to approx 15m/s. Above this the automatic “furling”
mechanism is activated to turn the generator at an angle to the wind to protect
the turbine, generator and supporting structure from severe electrical and
mechanical loads due to high winds. When the wind speed subsides, the tail
assembly will automatically return the turbine to normal operation. In prolonged
gusty & turbulent conditions, the system may be seen to repeat this cycle many
times. Power will be reduced during furling. For effective operation of the furling
system the wind turbine must be sited to ensure it is as free as possible from
turbulence and in a stable upright position.
